Unreachable code

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Unreachable code is a section of code in a program that can never be executed. [1]

Having unreachable code is bad because it wastes space on the disk, memory, and CPU cache.

Luckily, many modern compilers alert the programmer with a warning or error whenever it detects unreachable code.

Example[change | change source]

  void beepForever() {
      while (true) {

In this example, ":'(" will never be printed because the loop never exits.

References[change | change source]

  1. "Java 7 Language Specification".